Cisco
200-301 · Question #283
What mechanism carries multicast traffic between remote sites and supports encryption?
The correct answer is B. GRE over iPsec. Ipsec dosent support multicast, that is why GRE used with VPN, and as long as the GRE is not totally secure, the whole GRE. Encapsulation can be encapsulated in ipsec header so now we have both "mulitcast ability and security".
Submitted by klara.se· Mar 5, 2026IP Connectivity
Question
What mechanism carries multicast traffic between remote sites and supports encryption?
Options
- AISATAP
- BGRE over iPsec
- CiPsec over ISATAP
- DGRE
How the community answered
(45 responses)- A4% (2)
- B73% (33)
- C7% (3)
- D16% (7)
Explanation
Ipsec dosent support multicast, that is why GRE used with VPN, and as long as the GRE is not totally secure, the whole GRE. Encapsulation can be encapsulated in ipsec header so now we have both "mulitcast ability and security".
Topics
#GRE tunnel#IPsec#multicast transport#VPN encryption
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